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28793956 = 2226832
BaseRepresentation
bin110110111010…
…1110001100100
32000011212212211
41231311301210
524332401311
62505053204
7466513252
oct155656144
960155784
1028793956
1115287364
129787204
135c72059
143b775d2
1527db821
hex1b75c64

28793956 has 9 divisors (see below), whose sum is σ = 50408211. Its totient is φ = 14391612.

The previous prime is 28793951. The next prime is 28793981. The reversal of 28793956 is 65939782.

The square root of 28793956 is 5366.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28793951) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9391 + ... + 12073.

Almost surely, 228793956 is an apocalyptic number.

28793956 is the 5366-th square number.

It is an amenable number.

28793956 is a deficient number, since it is larger than the sum of its proper divisors (21614255).

28793956 is an frugal number, since it uses more digits than its factorization.

28793956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5370 (or 2685 counting only the distinct ones).

The product of its digits is 816480, while the sum is 49.

The cubic root of 28793956 is about 306.5023289841.

Multiplying 28793956 by its sum of digits (49), we get a square (1410903844 = 375622).

The spelling of 28793956 in words is "twenty-eight million, seven hundred ninety-three thousand, nine hundred fifty-six".

Divisors: 1 2 4 2683 5366 10732 7198489 14396978 28793956